Scraper device

Abstract

The utility model discloses a scraper device, and belongs to the technical field of scrapers. The problem that in the prior art, a spiral compression spring used on a scraper often blocks materials is solved. The device mainly comprises a bottom plate and a scraper, the scraper is fixedly connected with a supporting arm extending downwards, the supporting arm is rotationally connected with the bottom plate through a rotating shaft, the bottom of the supporting arm is located on the lower side of the rotating shaft, a torsional spring is installed between the supporting arm and the bottom plate and comprises a torsional spring body, and the rotating shaft is sleeved with the torsional spring body. The end, close to the supporting arm, of the torsion spring body is connected with a first torsion arm, the first torsion arm is located on the front side of the supporting arm and abuts against the supporting arm, a limiting piece is installed on the portion, on the front side of the supporting arm, of the bottom plate, the limiting piece abuts against the supporting arm, and the abutting position of the limiting piece and the supporting arm is located on the lower side of the rotating shaft.

Description

Technical Field

[0001] This utility model belongs to the field of scraper technology, and more specifically, it relates to a scraper device. Background Technology

[0002] When mixing tanks and similar equipment are in operation, they sometimes have scrapers installed inside. These scrapers are mounted on the mixing shaft inside the tank via a bracket or other structure. During operation, the mixing shaft drives the scraper to rotate, and one end of the scraper contacts the circumferential inner wall of the mixing tank. As the scraper rotates, it scrapes off material from the inner wall. Currently, many scrapers have a spring installed between them and their base. The spring provides a certain elastic preload to the scraper, ensuring it remains in contact with the inner wall of the mixing tank. The spring also helps extend the scraper's lifespan. Currently, the spring between the scraper and its base is generally a helical compression spring. Helical compression springs typically have a large pitch, and during use, material from the mixing tank often enters the helical compression spring, affecting its compression and consequently impacting the scraper's normal operation. Summary of the Invention

[0003] The purpose of this invention is to provide a scraper device to overcome the problem that the spiral compression springs used in scrapers in the prior art often clog materials.

[0004] This utility model is achieved using the following technical solution: a scraper device, including a base plate and a scraper, wherein the scraper is fixedly connected to a downwardly extending support arm, the support arm is rotatably connected to the base plate via a rotating shaft, and the bottom of the support arm is below the rotating shaft. A torsion spring is installed between the support arm and the base plate, the torsion spring including a torsion spring body, the torsion spring body being fitted onto the rotating shaft, and a first torsion arm connected to one end of the torsion spring body near the support arm, the first torsion arm being in front of the support arm and abutting against the support arm. A limiting member is installed on the base plate in front of the support arm, the limiting member abutting against the support arm, and the abutting position of the limiting member against the support arm is below the rotating shaft.

[0005] Furthermore, the limiting member includes a first screw and abuts against the support arm through the first screw. A screw support is installed on the base plate, and a first threaded hole that mates with the first screw is opened on the screw support. One end of the first screw passes through the first threaded hole and abuts against the support arm.

[0006] Furthermore, the torsion spring body is connected to a second torsion arm at the end away from the support arm, and the second torsion arm is on the upper side of the base plate.

[0007] Furthermore, a torsion spring torque adjustment structure is installed on the base plate. The torsion spring torque adjustment structure includes a second screw and a bracket installed on the base plate. The bracket includes a top plate with a top plate hole that mates with the second screw. The second screw passes through the top plate hole and an adjusting nut is installed on the upper side of the top plate. An adjusting hole is provided at the bottom of the second screw, and the second torsion arm passes through the adjusting hole and abuts against the bottom of the adjusting hole.

[0008] Furthermore, the bracket has a square frame structure.

[0009] Furthermore, the top of the support arm is connected to the front side of the scraper, and the rear end of the scraper is provided with a blade.

[0010] Furthermore, a sleeve is fixedly connected to the lower side of the support arm, and the rotating shaft passes through the sleeve.

[0011] Furthermore, a pivot support is installed on both sides of the base plate, and a pivot mounting hole is opened on the upper side of the pivot support on both sides. The pivot passes through the pivot mounting hole on the pivot support on both sides, and a stop is provided at both ends of the pivot.

[0012] Furthermore, the stop at one end of the rotating shaft is a fixed stop block, which is fixedly connected to the rotating shaft, and the outer diameter of the fixed stop block is larger than the outer diameter of the rotating shaft. The stop at the other end of the rotating shaft is a cotter pin, and the rotating shaft has a pin hole at the end where the cotter pin is set, through which the cotter pin passes.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model changes the current structure of the scraper by replacing the helical compression spring with a torsion spring. The pitch of the helical torsion spring body is very small, so it will hardly cause material blockage, thus solving the problem that the helical compression spring currently used on the scraper often causes material blockage.

[0015] 2. This utility model can extend the service life of the scraper. During the use of the scraper, since the first torsion arm on the torsion spring is on the front side of the support arm and abuts against the support arm, the torsion spring will give the support arm a downward rotational elastic force. Since the bottom of the support arm extends downward beyond the pivot, and the abutment position of the first screw and the support arm is below the pivot, when the support arm abuts against the first screw, the first screw will restrict the downward rotation of the support arm. We can call the position of the scraper when the support arm abuts against the first screw the initial position. This utility model can adjust the length of the first screw extending out of the screw support by rotating the first screw, thereby achieving the purpose of adjusting the initial position of the scraper. When the scraper is worn to a certain extent during use, we can adjust the initial position of the scraper to keep the scraper always close to the inner wall of the mixing tank, thereby extending the service life of the scraper.

[0016] 3. This utility model allows for convenient adjustment of the torsion spring's torque on the support arm. When adjusting, to increase the torsion spring's torque on the support arm, the second torsion arm can be lifted a certain height using a tool. As the second torsion arm is lifted, it passes through the adjustment hole at the bottom of the second screw, simultaneously pushing the second screw upwards and moving the adjusting nut upwards. Then, the adjusting nut is rotated downwards a certain distance. Finally, when the second torsion arm is no longer lifted, it re-engages with the bottom of the adjustment hole under the torsion spring's torque, and the adjusting nut re-engages with the top plate. When decreasing the torsion spring's torque on the support arm, the adjusting nut is first rotated upwards. The second torsion arm rotates downwards under the torsion spring's torque. During this process, when the second screw is not in contact with the top of the base plate, the second torsion arm remains in contact with the bottom of the adjustment hole, causing it to simultaneously move the second screw and adjusting nut downwards, bringing the adjusting nut into contact with the top of the top plate. Attached Figure Description

[0017] Figure 1 and Figure 2 These are perspective views of this utility model.

[0018] In the diagram: 1. Base plate; 2. Scraper; 3. Support arm; 4. Rotating shaft; 5. Torsion spring; 6. Torsion spring body; 7. First torsion arm; 8. First screw; 9. Screw support; 10. Second torsion arm; 11. Second screw; 12. Bracket; 13. Top plate; 14. Adjusting nut; 15. Adjusting hole; 16. Sleeve; 17. Rotating shaft support; 18. Fixed stop; 19. Cotter pin. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort should fall within the scope of protection of this utility model.

[0020] A scraper device includes a base plate 1 and a scraper 2. The base plate 1 is square, and a rotating shaft 4 is mounted on it. Rotating shaft supports 17 are mounted on both sides of the base plate 1, and rotating shaft mounting holes are respectively opened on the upper side of the two rotating shaft supports 17. The rotating shaft 4 passes through the rotating shaft mounting holes on the two rotating shaft supports 17. Stops are provided at both ends of the rotating shaft 4. One end of the rotating shaft 4 uses a fixed stop block 18, which is fixedly connected to the rotating shaft 4, and the outer diameter of the fixed stop block 18 is larger than the outer diameter of the rotating shaft 4. The other end of the rotating shaft 4 uses a cotter pin 19, and a pin hole is opened at the end of the rotating shaft 4 where the cotter pin 19 is located, through which the cotter pin 19 passes. This invention, by using a cotter pin 19 as one of the stops, facilitates the assembly of the rotating shaft 4 onto the rotating shaft supports 17 on the base plate 1. This invention can be applied not only in mixing tanks but also in equipment such as reaction vessels.

[0021] The scraper 2 is disposed on the upper side of the base plate 1, and the rear end of the scraper 2 is provided with a blade. The scraper 2 is fixedly connected to a downwardly extending support arm 3, and the top of the support arm 3 is connected to the front side of the scraper 2.

[0022] The support arm 3 is rotatably connected to the base plate 1 via a rotating shaft 4. A sleeve 16 is fixedly connected to the lower side of the support arm 3. The support arm 3 and the sleeve 16 are an integral unit. The rotating shaft 4 passes through the sleeve 16, and the support arm 3 rotates relative to the rotating shaft 4 via the sleeve 16.

[0023] The bottom of the support arm 3 extends downward beyond the pivot 4, thus placing the bottom of the support arm 3 below the pivot 4.

[0024] A torsion spring 5 is installed between the support arm 3 and the base plate 1. The torsion spring 5 includes a torsion spring body 6, which is fitted onto the rotating shaft 4. A first torsion arm 7 is connected to the end of the torsion spring body 6 near the support arm 3. The first torsion arm 7 is located on the front side of the support arm 3 and abuts against it. A second torsion arm 10 is connected to the end of the torsion spring body 6 away from the support arm 3. The second torsion arm 10 is located on the upper side of the base plate 1. This utility model changes the structural form of the current scraper 2 device by replacing the helical compression spring with a torsion spring 5. The pitch of the helical torsion spring body 6 on the torsion spring 5 is very small, so it almost never causes material blockage, thus solving the problem that the helical compression spring in the current scraper device often causes material blockage.

[0025] The base plate 1 has a limiting member installed on the front side of the support arm 3. The limiting member abuts against the support arm 3, and the abutment position between the limiting member and the support arm 3 is below the rotating shaft 4. The limiting member includes a first screw 8 and abuts against the support arm 3 through the first screw 8. A screw support 9 is installed on the base plate 1. A first threaded hole is opened on the screw support 9 to cooperate with the first screw 8. One end of the first screw 8 passes through the first threaded hole and abuts against the support arm 3.

[0026] In this invention, since the first torsion arm 7 on the torsion spring 5 is in front of the support arm 3 and abuts against the support arm 3, the torsion spring 5 will give the support arm 3 a downward rotational elastic force. Since the bottom of the support arm 3 extends downward beyond the rotating shaft 4, and the abutment position of the first screw 8 and the support arm 3 is below the rotating shaft 4, when the support arm 3 abuts against the first screw 8, the first screw 8 will restrict the support arm 3 from rotating downward. We can call the position of the scraper 2 when the support arm 3 abuts against the first screw 8 the initial position. In this invention, by rotating the first screw 8, the length of the first screw 8 extending out of the screw support 9 can be adjusted, thereby achieving the purpose of adjusting the initial position of the scraper 2. When the scraper 2 is worn to a certain extent during use, we can adjust the initial position of the scraper 2 to keep the scraper 2 always close to the inner wall of the mixing tank, thereby extending the service life of the scraper 2.

[0027] A torsion spring torque adjustment structure is installed on the base plate 1. The torsion spring torque adjustment structure includes a second screw 11 and a bracket 12 installed on the base plate 1. The bracket 12 is a square frame structure and includes a top plate 13. A top plate hole is opened on the top plate 13 to cooperate with the second screw 11. The second screw 11 passes through the top plate hole and an adjusting nut 14 is installed on the upper side of the top plate 13. An adjusting hole 15 is opened at the bottom of the second screw 11. The second torsion arm 10 passes through the adjusting hole 15 and abuts against the bottom of the adjusting hole 15.

[0028] The process of adjusting the torque of the torsion spring 5 according to this utility model is as follows: When it is necessary to increase the torque of the torsion spring 5 on the support arm 3, the second torsion arm 10 can be lifted upwards to a certain height using a tool. When the second torsion arm 10 is lifted upwards, since the second torsion arm 10 passes through the adjustment hole 15 at the bottom of the second screw 11, the second torsion arm 10 will simultaneously push the second screw 11 upwards, and the adjusting nut 14 will also move upwards. At this time, we rotate the adjusting nut 14 downwards a certain distance. Finally, when the second torsion arm 10 is not lifted upwards, the second torsion arm 10 will be lowered under the torque of the torsion spring 5. The new adjustment hole 15 abuts against the bottom, and the adjustment nut 14 also abuts against the top plate 13 again. When it is necessary to reduce the torque of the torsion spring 5 on the support arm 3, we first need to turn the adjustment nut 14 upward. The second torsion arm 10 will rotate downward under the torque of the torsion spring 5. During this process, when the second screw 11 is not in contact with the top of the base plate 1, since the second torsion arm 10 is always abutting against the bottom of the adjustment hole 15, the second torsion arm 10 will simultaneously drive the second screw 11 and the adjustment nut 14 to move downward, and make the adjustment nut 14 abut against the top of the top plate 13.

Claims

1. A scraper device, characterized in that, The device includes a base plate (1) and a scraper (2). The scraper (2) is fixedly connected to a downwardly extending support arm (3). The support arm (3) is rotatably connected to the base plate (1) via a rotating shaft (4). The bottom of the support arm (3) is below the rotating shaft (4). A torsion spring (5) is installed between the support arm (3) and the base plate (1). The torsion spring (5) includes a torsion spring body (6). The torsion spring body (6) is fitted onto the rotating shaft (4). A first torsion arm (7) is connected to one end of the torsion spring body (6) near the support arm (3). The first torsion arm (7) is on the front side of the support arm (3) and abuts against the support arm (3). A limiting member is installed on the front side of the base plate (1). The limiting member abuts against the support arm (3), and the abutment position of the limiting member and the support arm (3) is below the rotating shaft (4).

2. The scraper device according to claim 1, characterized in that, The limiting component includes a first screw (8) and abuts against the support arm (3) through the first screw (8). A screw support (9) is installed on the base plate (1). A first threaded hole is opened on the screw support (9) to cooperate with the first screw (8). One end of the first screw (8) passes through the first threaded hole and abuts against the support arm (3).

3. The scraper device according to claim 1, characterized in that, The torsion spring body (6) is connected to a second torsion arm (10) at one end away from the support arm (3), and the second torsion arm (10) is on the upper side of the base plate (1).

4. The scraper device according to claim 3, characterized in that, A torsion spring torque adjustment structure is installed on the base plate (1). The torsion spring torque adjustment structure includes a second screw (11) and a bracket (12) installed on the base plate (1). The bracket (12) includes a top plate (13). A top plate hole is opened on the top plate (13) to cooperate with the second screw (11). The second screw (11) passes through the top plate hole and an adjusting nut (14) is installed on the upper side of the top plate (13). An adjusting hole (15) is opened at the bottom of the second screw (11). The second torsion arm (10) passes through the adjusting hole (15) and abuts against the bottom of the adjusting hole (15).

5. A scraper device according to claim 4, characterized in that, The bracket (12) has a square frame structure.

6. A scraper device according to claim 1, characterized in that, The top of the support arm (3) is connected to the front side of the scraper (2), and the rear end of the scraper (2) is provided with a blade.

7. A scraper device according to claim 1, characterized in that, A sleeve (16) is fixedly connected to the lower side of the support arm (3), and the rotating shaft (4) passes through the sleeve (16).

8. A scraper device according to claim 1, characterized in that, The base plate (1) is equipped with a rotating shaft support (17) on both sides. The upper side of the rotating shaft support (17) on both sides is provided with a rotating shaft mounting hole. The rotating shaft (4) passes through the rotating shaft mounting hole on the rotating shaft support (17) on both sides. The two ends of the rotating shaft (4) are respectively provided with a stop.

9. A scraper device according to claim 8, characterized in that, The stop at one end of the rotating shaft (4) is a fixed stop block (18), which is fixedly connected to the rotating shaft (4). The outer diameter of the fixed stop block (18) is larger than the outer diameter of the rotating shaft (4). The stop at the other end of the rotating shaft (4) is a cotter pin (19). The rotating shaft (4) has a pin hole at the end where the cotter pin (19) is set, and the cotter pin (19) passes through the pin hole.

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